They have someone there for them and a person to tell everything to, someone they trust . .
And always brag on something(twitter, facebook, tumblr, etc.) about going or having fun with that person .They have some one to rely on and share everything with. Plus they’d never split.They’d have loads in common, never run out of things to talk about, have the best of times together, crack up with, someone who gets/understands you, that comforts you and cheers you up.